How can I use setregion() to set region when user location is moving only? - ios

Question

I have tried removing my setRegion() but it still persists to not allow map panning. The build overrides finger gestures for exploring the mapview and responds very briefly before reverting back to original position. I am not sure the issue. I have rewritten my code to a new project and there is no issue, can anyone explain to me where I am going wrong?
import UIKit
import MapKit
import CoreLocation
class ViewController: UIViewController {
#IBOutlet weak var mapView: MKMapView!
let locationManager = CLLocationManager()
let regionInMeters: Double = 15000
override func viewDidLoad() {
super.viewDidLoad()
checkLocationServices()
}
func setupLocationManager(){
locationManager.delegate = self
locationManager.desiredAccuracy = kCLLocationAccuracyBest
}
func centerUserLocation(){
if let location = locationManager.location?.coordinate{
let region = MKCoordinateRegion.init(center: location, latitudinalMeters: regionInMeters, longitudinalMeters: regionInMeters)
mapView.setRegion(region, animated: true)
}
}
func checkLocationServices(){
if CLLocationManager.locationServicesEnabled(){
setupLocationManager()
checkLocationAuthorization()
} else {
// alert user must turn on
}
}
func checkLocationAuthorization(){
switch CLLocationManager.authorizationStatus(){
case .authorizedWhenInUse:
mapView.showsUserLocation = true
centerUserLocation()
locationManager.startUpdatingLocation()
break
case .denied:
mapView.showsUserLocation = false
break
case .notDetermined:
locationManager.requestWhenInUseAuthorization()
break
case .restricted:
//supervisory controls enabled
mapView.showsUserLocation = false
break
case .authorizedAlways:
mapView.showsUserLocation = true
break
}
}
}
extension ViewController: CLLocationManagerDelegate{
func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
guard let location = locations.last else {return}
let center = CLLocationCoordinate2D(latitude: location.coordinate.latitude, longitude: location.coordinate.longitude)
let region = MKCoordinateRegion.init(center: center, latitudinalMeters: regionInMeters, longitudinalMeters: regionInMeters)
mapView.setRegion(region, animated: true)
}
func locationManager(_ manager: CLLocationManager, didChangeAuthorization status: CLAuthorizationStatus) {
checkLocationAuthorization()
}
}

Answer 1

You are calling setRegion in didUpdateLocations - This will change the map region every time you get a location update; about once per second with best accuracy; even when the user isn’t moving
If you want user tracking on your map view, you should use the in-built userTrackingMode capabilities.